

A117268


Triangle, binomial transform of the tribonacci sequence.


2



1, 1, 1, 2, 1, 2, 4, 2, 3, 5, 7, 4, 6, 9, 14, 13, 7, 11, 17, 26, 40, 24, 13, 20, 31, 48, 74, 114, 44, 24, 37, 57, 88, 136, 210, 324, 81, 44, 68, 105, 162, 250, 386, 596, 920
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OFFSET

1,4


COMMENTS

Leftmost column of the triangle = the tribonacci sequence A000073.
Rightmost diagonal of the triangle = A117189.


LINKS



FORMULA



EXAMPLE

Taking difference rows of A117267: (1; 1, 2; 2, 3, 5; 4, 6, 9, 14;...), we get A117268:
1;
1, 1;
2, 1, 2;
4, 2, 3, 5;
7, 4, 6, 9, 14;
13, 7, 11, 17, 26, 40;
24, 13, 20, 31, 48, 74, 114;
...


CROSSREFS



KEYWORD



AUTHOR



STATUS

approved



